Lock.



A. RE.

LOCK.

APPLICATloN FILED ocr. 7. |915.

Patented May16,1916.

www?, I

VTi' 'S 5 47 ALFRED RE, 0F NEW YORK, N. Y.

LOCK.

Specification of Letters Patent.

Patented May 16, 1916.

Application led October 7, 1915. Serial No. 54,597.

To all whom t may concern:

Be it known that I, ALFRED Rn,.a citizen of the United States, residingat New York, in the county of New York and State of New York,have-invented certain new and useful Improvements in Locks; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art towwhich it appertains to make and use thesame.

My invention relates to new and useful improvements in locks and is moreparticularly an improvement over my former Patent No. 1,134,907, datedApril 6,1915, and my object is to provide a pivot latch adaptedto engagewith the keeper to hold the door in closed position.

` A further object is to provide a locking pin having a spiral slottherein which when the pin is rotated will coperate with a stud to causethe locking pin to move longitudinally.

A further object is to provide a slot in the end of the locking pin toreceive a key, said key being adapted to operate the locking pin. Y

A further object is to provide suitable slots in the faces and edges ofthe key to cooperate with projections in the pin receiving tube.

A further object is to provide the pivot pin of the latch with a slotfor the reception of the key, said key being designed to swing the latchout of engagement with its keeper when the locking pin is disengagedtherefrom.

A further object is to provide a plurality of projections adapted tocoperate with notches formed in the key. And a further object is toprovide suitable drums through which the keys are introduced, said drumshaving notches therein adapted to prevent the introduction of the wrongkey.

Other objects and advantages will be hereinafter set forth and moreparticularly pointed out in the accompanying specification.

In the accompanying drawings which are made a part of this application,Figure 1 is a horizontal central sectional view through the lock andparts coperating therewith. Fig. 2 is a detail plan view of keyreceiving sockets showing the manner of securingthe 'drums therein. Fig.3 is an end elevation of one of the drums. Fig. 4 is a transversesectional view thereof. Fig. 5 is a side elevation of one of the drums.Figs. 6 and 7 are side elevations of a key employed for swinging thelatch on its pivot showing opposite sides thereof. Figs. 8 and 9 aresimilar view s of la key employed for operating the locking pin. Fig. 10is a transverse sectional view through the latch operating pin. Fig. 11is a similar view of the locking pin operating key, and Fig. 12 is adetail sectional view of the key engaging end of the latch pivot pin.

' Referring to the drawings in which similar reference numeralsdesignate corresponding parts throughout the several views, 1 indicatesa door which may be constructed in the usual or any preferred manner and2 the door jamb, the edge of the door having an offset' 3 therein toreceive a projection 4 of the door jamb. Secured to the face of the doorjamb and partially embedded therein is a keeper 5, said keeper having anotch 6 therein to receive the end of the latch 7 said latch having atits opposite end a pivot pin 8, said pin finding bearings in a plate 9which plate is attached to the face of the door. The latch 7 is alsoprovided with a recess 7a in one face thereof which receives one wall ofthe notch 6 of the keeper 5 and renders the lock jimmy proof.

The inner end of the pivot pin 8 is entered in a tube 10 and is providedwith a notch 11 to receive the end of a key' 12, said key having a notch13 in its end to receive a cross bar 14 formed at the longitudinalcenter of the notch 11. The inner end of the tube 10 is entered into athimble 15 which thimble is threaded into the open end of a socket 16carried by a plate 17, said late being attached to the outer face of theoor.

The end of the socket 16 projects through the plate 17 and is restrictedto form a shoulder 18 between which and the end of the thimble 15 ispositioned a drum 19, said drum having a slot 20 therethrough for thereception of the key 12, one face of the slot having a pair ofextensions 21 to engage the longitudinally extending recesses 22 in oneface of the key, while the opposite face of the slot is provided with asingle extension 24 adapted to engage a single slot 25 on the oppositeface of the key, and it will be readily seen that unless the key isprovided with slots arranged to receive the extensions, it can not beintroduced in the slot in the drum. Each edge of the key 12 is providedwith notches 26 and 27 respectively, which notches are designed tocoperate with projections 28 and 29 on the interior of the tube 10 andunless said notches are arranged to register with said projections, itwill be impossible to rotate the key after it is introduced into thetube.

To guard against the introduction of the key after the notches have beenremoved therefrom, each key is provided with one or more openings 30with which is adapted to engage a pin 31 carried by a pawl 32, said pawlbeing pivotally mounted in a cavity 33 formed in the drum, said pawlbeing movable transversely of the path of the key. The pawl is held inengagement with one face of the key as it passes into the lock by meansof a spring 34, the engaging face of the free end of the pawl beingwider than any of the notches in the edge of the key so that when theproper key is introduced the pin will be held out of engagement with theopening in the key, but should the key be iiled to remove the notches,the free end of the pawl will move inwardly so as to bring the pin intothe path of the opening in the key and when one of the openings isbrought into registration with the pin, the spring 34 will force the pininto said opening and prevent the further introduction of the key intothe lock.

The inner end of the locking pin 37 is provided with a notch 43 withwhich cooperates the end of a key 44, one edge of the key having aplurality of notches 45 which, when properly constructed, register withprojections 46 on the interior of the tube 41. This key is of similarconstruction to the key 12 except that there is but one longitudinalgroove on each side of the key, the' groove 46 being centrally of thekey, while the groove 47 is adjacent one edge thereof. The edge of thekey opposite the notches 45 is also provided with offset portions 48 and49, the offset 4S coperating with the shoulder in the notch 43, whilethe offset 49 coperates with the interior face of the tube 41. In thisinstance a pair of openings 50 are formed through the key with whichcoperates a pawl 51 similar to the pawl 32, carried by the drum 52.

The inner end of the thimble 42 and the drum 52 are mounted in a socket53 similar to the socket 16, said socket having a slot 54 to receive astud 55 carried by the drum 52. In operating the latch to open the same,the key 44 is first introduced through the drum 52 and the end thereofengaged with the notch 43 in the end of the locking pin 37 and the keythen given a quarter turn, this operation causing the locking pin totravel out of engagement with the socket in the latch, owing to theformation of the cam slot of the locking pin and the stationary studengaging the same. The length of the key 44 is such that when the pin 37is in locked position the end of the key will just enter the notch 43 asufiicient distance to insure the rotation of the pin when the key isrotated and will travel into the notch as the pin moves toward the keyand vice versa when the pin is in unlocked position. The key 12 is thenintroduced through the drum 19 and the end thereof engaged with thenotch 11 in the end of the pivot pin 8, when by giving said key aquarter turn the latch will be raised out of engagement with the notchof the keeper so that the door may be swung open, thus requiring twoseparate and distinct keys for unlocking and operating the latch. Inlocking the latch, how* ever, it is but necessary to use the key 44, thesame being employed for giving reverse rotation to the locking pin inorder to enter the same into the socket 38 of the latch. When the latchis thus secured, it will be impossible to open the door until such timeas the locking pin is released from the latch and the key introducedinto engagement with the pivot pin of the latch, that is to say from theexterior of the building or room. The keys 12 and 44 have their forwardends slightly rounded on one face of the key so that when introducedinto the drums, the ends of the keys will readily enter between thepawls and the contiguous portions of the drums, the pawls readilytraveling over the rounded surfaces and moving out of the path of thekeys. It will be understood of course that it is not necessary to turnthe locking pin into engagement with the latch in order to lock the dooras the latch will ride up the keeper 5 and enter the notch 6 andsecurely hold the door in closed position until the latch is againraised, either by hand or through the medium of the key 12. It will alsobe seen that by providing the offset in the door and door jamb `and byplacing a protecting plate f56 on the inner face of the door adjacentthe keeper 55, it will be impossible to use a jimmy or other tool forraising the latch. It will likewise be seen that should keys having thesame longitudinal channels therein but different notches from thoseshown on the key be filed down to eliminate the notches so as to passthe projections in the tube, the pawls in the drum will drop into theopenings in the key and prevent their introduction into the lock.

I-Iaving thus fully described my invention what I claim as new anddesire to secure by Letters Patent of the United States is 1. In a lock,a pivotally mounted latch, a keeper coperating therewith, a'key adaptedto engage the pivot point of the latch to disengage the latch from thekeeper, said key having openings therein, a pawl having a pin adapted toengage the. openings in the and means on the pawl to hold the pin out ofengagement with the openings when the proper key is used.

2. In a lock, a pivotally mounted latch, a keeper coperating therewith,a key adapted to engage the pivot pin of the latch to raise said latchwhen the key is rotated, said key having openings transverselytherethrough, a drum through which said key extends, a pawl pivotallymounted within the drum and moving in a plane at right angles to thepath of the key, a pin on the pawl adapted to enter said openings andprevent the full insertion and operation of the key, and additionalmeans on the pawl adapted to hold the pin out of engagement with saidopenings when the proper key is used.

3. In a lock, a latch, a keeper coperating therewith, a pivot pin forthe latch, a lock ing bolt, means to cause the locking pin to travelinto or out of engagement with the latch, an operating key for thelocking pin having transverse openings therethrough, a drum throughwhich said key extends, a

pawl having a pin thereon adapted to engage said openings to prevent theintroduction and operation of the key and means on said pawl to engagethe right key and hold the pin out of engagement with the openings.

4. In a lock, the combination with a pivoted latch, a locking meanstherefor, and keys to operate the locking means and latch, said keyshaving openings transversely therethrough, of drums through whichsaidkeys extend, pawls carried by the drums having pins thereon adaptedto enter said openings to prevent the operation of said keys andadditional means on the pawls to prevent the pins from entering theopenings in the right ze s.

ln testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ALFRED RE. Witnesses:

W. SooTxIRxPATRIoK, FRANCK LEPORE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

